The latest Carroll Poll, conducted on June 15 and 16, asked likely voters (those who voted in the last two general elections) who they will vote for in the November 2018 General Election. The sample size for this poll was 1199 registered voters. It was balanced by Congressional District, party affiliation, gender, and age. The margin of error was plus or minus 2.8 percentage points.

The results below are cumulative responses from a statewide sample. However, the responses from the U.S. Congressional races were taken from respondents within their respective districts.